JP5804440B1 - Biopsy needle device - Google Patents

Biopsy needle device Download PDF

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JP5804440B1
JP5804440B1 JP2015097973A JP2015097973A JP5804440B1 JP 5804440 B1 JP5804440 B1 JP 5804440B1 JP 2015097973 A JP2015097973 A JP 2015097973A JP 2015097973 A JP2015097973 A JP 2015097973A JP 5804440 B1 JP5804440 B1 JP 5804440B1
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needle
inner needle
holding member
piston
locking means
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JP2016209433A (en
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今井　孝典
孝典 今井
廣田　淳
淳 廣田
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MEDFORCE JAPAN CO., LTD.
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Priority to US15/502,673 priority patent/US10575832B2/en
Priority to CN201680002301.5A priority patent/CN106659485B/en
Priority to PCT/JP2016/064224 priority patent/WO2016182043A1/en
Priority to KR1020177004147A priority patent/KR101769272B1/en
Priority to EP16792767.2A priority patent/EP3184054B1/en
Publication of JP2016209433A publication Critical patent/JP2016209433A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A61B10/0266—Pointed or sharp biopsy instruments means for severing sample
    • A61B10/0275—Pointed or sharp biopsy instruments means for severing sample with sample notch, e.g. on the side of inner stylet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A61B10/0266—Pointed or sharp biopsy instruments means for severing sample
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A61B10/0283—Pointed or sharp biopsy instruments with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B2010/0208—Biopsy devices with actuators, e.g. with triggered spring mechanisms

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  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Surgical Instruments (AREA)

Abstract

【課題】生体組織の採取に失敗する確率を飛躍的に低減させる。【解決手段】生検針装置１は、内針係止手段８の係止解除操作に応じた内針２の発射後、ピストン係止手段１６の係止解除操作に応じてピストン後退バネ１５がピストン１４を後退させることにより、内針２の凹部２ａに負圧を発生させて該凹部２ａ内に生体組織を吸引し、その後、外針係止手段９の係止解除操作に応じて外針３を発射させて凹部２ａに入り込んだ生体組織を切断採取するように構成される。【選択図】図６An object of the present invention is to drastically reduce the probability of failure in collecting a biological tissue. A biopsy needle device (1) is configured such that after the inner needle (2) is fired in response to the unlocking operation of the inner needle locking means (8), the piston retraction spring (15) is moved in accordance with the unlocking operation of the piston locking means (16). By retracting 14, a negative pressure is generated in the recess 2 a of the inner needle 2 to suck the living tissue into the recess 2 a, and then the outer needle 3 according to the unlocking operation of the outer needle locking means 9. Is cut and collected from the living tissue that has entered the recess 2a. [Selection] Figure 6

Description

本発明は、生体組織を採取する際に使用される生検針装置に関する。   The present invention relates to a biopsy needle device used when collecting biological tissue.

生検針装置としては、先端近傍の外周部に凹部を有する内針と、内針に対して長さ方向摺動自在に外嵌する円筒状の外針と、内針の基端部を保持する内針保持部材と、外針の基端部を保持する外針保持部材と、内針保持部材及び外針保持部材を進退自在に収容する筐体と、内針保持部材及び外針保持部材を後退操作する後退操作手段と、後退操作された内針保持部材を所定の発射待機位置で係止する内針係止手段と、後退操作された外針保持部材を所定の発射待機位置で係止する外針係止手段と、内針係止手段及び外針係止手段を順次係止解除する係止解除操作手段と、内針保持部材の後退操作に応じて蓄勢され、内針係止手段の係止解除操作に応じて内針を前進方向に発射させる内針発射バネと、外針保持部材の後退操作に応じて蓄勢され、外針係止手段の係止解除操作に応じて外針を前進方向に発射させる外針発射バネと、を備え、内針の発射後に該内針の凹部に入り込んだ生体組織を外針の発射により切断採取するものが知られている（例えば、特許文献１参照）。このような生検針装置によれば、内針及び外針を生体に刺入した後、内針の発射操作及び外針の発射操作を順次行うだけで、生体組織を容易に採取することが可能になる。   As a biopsy needle device, an inner needle having a concave portion in the outer peripheral portion near the tip, a cylindrical outer needle that is slidably fitted to the inner needle in the longitudinal direction, and a proximal end portion of the inner needle are held. An inner needle holding member, an outer needle holding member that holds the proximal end portion of the outer needle, a housing that houses the inner needle holding member and the outer needle holding member so as to be able to advance and retract, and an inner needle holding member and an outer needle holding member. Retracting operation means for reversing operation, inner needle locking means for locking the retreated inner needle holding member at a predetermined firing standby position, and locking the retreated outer needle holding member at a predetermined firing standby position The outer needle locking means, the inner needle locking means and the outer needle locking means, and the unlocking operation means for sequentially releasing the locking of the inner needle locking means. The inner needle firing spring that fires the inner needle in the forward direction according to the unlocking operation of the means, and the energy stored according to the backward operation of the outer needle holding member An outer needle firing spring that fires the outer needle in a forward direction in response to an unlocking operation of the outer needle locking means, and discharges the living tissue that has entered the concave portion of the inner needle after firing the inner needle. What is cut and collected by the above is known (for example, see Patent Document 1). According to such a biopsy needle device, after inserting the inner needle and the outer needle into the living body, it is possible to easily collect the living tissue simply by sequentially performing the firing operation of the inner needle and the firing operation of the outer needle. become.

特公平６−２８６６３号公報Japanese Patent Publication No. 6-28663

しかしながら、特許文献１の生検針装置では、内針の発射後に該内針の凹部に生体組織が自主的に入り込むことが前提となっており、内針の凹部に生体組織が自主的に入り込まない場合は、外針を発射しても必要量の生体組織を採取することができないという問題があった。また、特許文献１の生検針装置では、生体組織の採取は可能であるが、体液を採取することは困難であった。   However, in the biopsy needle device of Patent Document 1, it is assumed that the biological tissue voluntarily enters the concave portion of the inner needle after the inner needle is fired, and the biological tissue does not voluntarily enter the concave portion of the inner needle. In this case, there is a problem that a necessary amount of living tissue cannot be collected even if the outer needle is fired. Further, with the biopsy needle device of Patent Document 1, it is possible to collect a biological tissue, but it is difficult to collect a body fluid.

本発明は、上記の如き実情に鑑みこれらの課題を解決することを目的として創作されたものであって、請求項１の発明は、先端近傍の外周部に凹部を有する内針と、前記内針に対して長さ方向摺動自在に外嵌する円筒状の外針と、前記内針の基端部を保持する内針保持部材と、前記外針の基端部を保持する外針保持部材と、前記内針保持部材及び前記外針保持部材を進退自在に収容する筐体と、前記内針保持部材及び前記外針保持部材を後退操作する後退操作手段と、後退操作された前記内針保持部材を所定の発射待機位置で係止する内針係止手段と、後退操作された前記外針保持部材を所定の発射待機位置で係止する外針係止手段と、前記内針係止手段及び前記外針係止手段を順次係止解除する係止解除操作手段と、前記内針保持部材の後退操作に応じて蓄勢され、前記内針係止手段の係止解除操作に応じて前記内針を前進方向に発射させる内針発射バネと、前記外針保持部材の後退操作に応じて蓄勢され、前記外針係止手段の係止解除操作に応じて前記外針を前進方向に発射させる外針発射バネと、を備え、前記内針の発射後に前記凹部に入り込んだ生体組織を前記外針の発射により切断採取する生検針装置であって、前記内針は、中空部を有する円筒針であり、前記内針保持部材は、前記内針の中空部を介して前記凹部と連通するシリンダと、前記シリンダに進退自在に内装されるピストンと、前記ピストンを所定の後退待機位置で係止するピストン係止手段と、前記内針保持部材の後退操作に応じて蓄勢され、前記ピストン係止手段の係止解除操作に応じて前記ピストンを前記シリンダに対して後退させるピストン後退バネと、を備え、前記係止解除操作手段は、前記内針係止手段、前記ピストン係止手段及び前記外針係止手段を順次係止解除することが可能であり、前記内針係止手段の係止解除操作に応じた前記内針の発射後、前記ピストン係止手段の係止解除操作に応じて前記ピストン後退バネが前記ピストンを後退させることにより、前記内針の凹部に負圧を発生させて該凹部内に生体組織を吸引し、その後、前記外針係止手段の係止解除操作に応じて前記外針を発射させて前記凹部に入り込んだ生体組織を切断採取することを特徴とする。
また、請求項２の発明は、先端近傍の外周部に凹部を有する内針と、前記内針に対して長さ方向摺動自在に外嵌する円筒状の外針と、前記内針の基端部を保持する内針保持部材と、前記外針の基端部を保持する外針保持部材と、前記内針保持部材及び前記外針保持部材を進退自在に収容する筐体と、前記内針保持部材及び前記外針保持部材を後退操作する後退操作手段と、後退操作された前記内針保持部材を所定の発射待機位置で係止する内針係止手段と、後退操作された前記外針保持部材を所定の発射待機位置で係止する外針係止手段と、前記内針係止手段及び前記外針係止手段を順次係止解除する係止解除操作手段と、前記内針保持部材の後退操作に応じて蓄勢され、前記内針係止手段の係止解除操作に応じて前記内針を前進方向に発射させる内針発射バネと、前記外針保持部材の後退操作に応じて蓄勢され、前記外針係止手段の係止解除操作に応じて前記外針を前進方向に発射させる外針発射バネと、を備え、前記内針の発射後に前記凹部に入り込んだ生体組織を前記外針の発射により切断採取する生検針装置であって、前記内針は、中空部を有する円筒針であり、前記内針保持部材は、前記内針の中空部を介して前記凹部と連通するシリンダと、前記シリンダに進退自在に内装されるピストンと、前記ピストンを前記シリンダに対して後退方向に付勢可能なピストン後退バネと、前記ピストンを所定の後退待機位置で係止するピストン係止手段と、を備え、前記筐体は、前記内針保持部材の後退操作時に前記ピストンの後退を制限し、該ピストンを前記シリンダに対して相対的に前進させつつ前記ピストン後退バネを蓄勢させるピストンストッパを備え、前記係止解除操作手段は、前記内針係止手段、前記ピストン係止手段及び前記外針係止手段を順次係止解除することが可能であり、前記内針係止手段の係止解除操作に応じた前記内針の発射後、前記ピストン係止手段の係止解除操作に応じて前記ピストン後退バネが前記ピストンを後退させることにより、前記内針の凹部に負圧を発生させて該凹部内に生体組織を吸引し、その後、前記外針係止手段の係止解除操作に応じて前記外針を発射させて前記凹部に入り込んだ生体組織を切断採取することを特徴とする。
請求項３の発明は、前記筐体の外部から前記シリンダの内部を目視可能にする体液採取確認窓を備えることを特徴とする。 The present invention was created with the object of solving these problems in view of the above circumstances, and the invention of claim 1 includes an inner needle having a recess in the outer peripheral portion near the tip, and the inner needle. A cylindrical outer needle that is slidably fitted to the needle in the longitudinal direction, an inner needle holding member that holds the proximal end portion of the inner needle, and an outer needle holding that holds the proximal end portion of the outer needle A member, a housing that accommodates the inner needle holding member and the outer needle holding member so as to be able to advance and retreat, a retraction operating means for retreating the inner needle holding member and the outer needle holding member, and the inner An inner needle locking means for locking the needle holding member at a predetermined firing standby position; an outer needle locking means for locking the retracted outer needle holding member at a predetermined firing standby position; A lock release operation means for sequentially releasing the lock means and the outer needle lock means; and after the inner needle holding member Accumulated according to the operation, accumulated according to the retraction operation of the outer needle holding member and the inner needle firing spring for firing the inner needle in the forward direction according to the unlocking operation of the inner needle locking means An outer needle firing spring that fires the outer needle in a forward direction in response to an unlocking operation of the outer needle locking means, and removes the living tissue that has entered the recess after the inner needle is fired. A biopsy needle device for cutting and collecting by firing a needle, wherein the inner needle is a cylindrical needle having a hollow portion, and the inner needle holding member communicates with the recess through the hollow portion of the inner needle And a piston that is housed in the cylinder so as to be able to move forward and backward, a piston locking means for locking the piston at a predetermined backward standby position, and stored in accordance with the backward operation of the inner needle holding member, The piston is moved in response to the locking release operation of the locking means. A piston retraction spring that retreats relative to the cylinder, and the locking release operating means sequentially releases the inner needle locking means, the piston locking means, and the outer needle locking means. After the inner needle is fired according to the unlocking operation of the inner needle locking means, the piston retraction spring retracts the piston according to the unlocking operation of the piston locking means. Generating negative pressure in the concave portion of the inner needle to suck biological tissue into the concave portion, and then firing the outer needle in accordance with the unlocking operation of the outer needle locking means to enter the concave portion It is characterized by cutting and collecting living tissue.
According to a second aspect of the present invention, there is provided an inner needle having a recess in an outer peripheral portion in the vicinity of the tip, a cylindrical outer needle that is slidably fitted in the longitudinal direction with respect to the inner needle, and a base of the inner needle. An inner needle holding member that holds an end portion, an outer needle holding member that holds a proximal end portion of the outer needle, a housing that houses the inner needle holding member and the outer needle holding member so as to freely advance and retract, A retraction operating means for retreating the needle holding member and the outer needle holding member; an inner needle locking means for locking the retreated inner needle holding member at a predetermined firing standby position; An outer needle locking means for locking the needle holding member at a predetermined firing standby position, an unlocking operation means for sequentially releasing the inner needle locking means and the outer needle locking means, and the inner needle holding Accumulated according to the retreating operation of the member, and firing the inner needle in the forward direction according to the unlocking operation of the inner needle locking means An inner needle firing spring that is energized, and an outer needle firing spring that is energized in accordance with a retraction operation of the outer needle holding member and that fires the outer needle in a forward direction in response to an unlocking operation of the outer needle locking means. A biopsy needle device that cuts and collects a living tissue that has entered the recess after the inner needle is fired by firing the outer needle, wherein the inner needle is a cylindrical needle having a hollow part, The needle holding member includes a cylinder that communicates with the recess through a hollow portion of the inner needle, a piston that is housed in the cylinder so as to freely advance and retreat, and a piston that can bias the piston in the backward direction with respect to the cylinder. A retraction spring, and piston locking means for locking the piston at a predetermined retraction standby position, and the housing restricts retraction of the piston when the inner needle holding member is retreated, Phase with respect to the cylinder A piston stopper for accumulating the piston retraction spring while moving forward, and the lock release operation means sequentially releases the lock of the inner needle lock means, the piston lock means and the outer needle lock means. And after the inner needle is fired in response to the unlocking operation of the inner needle locking means, the piston retraction spring retracts the piston in response to the unlocking operation of the piston locking means. By generating a negative pressure in the concave portion of the inner needle and sucking the living tissue into the concave portion, the outer needle is then fired in accordance with the unlocking operation of the outer needle locking means, and the It is characterized by cutting and collecting the living tissue that has entered the recess.
According to a third aspect of the present invention, there is provided a body fluid collection confirmation window that allows the inside of the cylinder to be visually observed from the outside of the casing.

請求項１の発明によれば、内針の発射後、ピストン係止手段の係止解除操作に応じてピストン後退バネがピストンを後退させることにより、内針の凹部に負圧を発生させて該凹部内に生体組織を吸い込むので、その後に発射される外針によって凹部に入り込んだ生体組織を確実に切断採取することができ、その結果、内針の凹部に生体組織が自主的に入り込むことを前提としている従来の生検針装置に比べ、生体組織の採取に失敗する確率を飛躍的に低減させることが可能になる。また、内針の凹部に負圧を発生させることにより、内針の中空部やシリンダ内に体液が吸い込まれるので、生体組織と同時に体液の採取も可能になる。
また、請求項２の発明によれば、請求項１と同様な効果が得られる。しかも、内針保持部材の後退操作時にピストンの後退を制限し、該ピストンをシリンダに対して相対的に前進させつつピストン後退バネを蓄勢させるピストンストッパを備えるので、内針保持部材の後退操作に応じたピストンの移動やピストン後退バネの蓄勢を簡単な構成で実現することができる。
また、請求項３の発明によれば、筐体の外部から体液採取確認窓を介して体液の採取状況を確認することが可能になる。 According to the first aspect of the present invention, after the inner needle is fired, the piston retracting spring retracts the piston in accordance with the unlocking operation of the piston locking means, thereby generating a negative pressure in the recess of the inner needle. Since the biological tissue is sucked into the concave portion, the biological tissue that has entered the concave portion can be reliably cut and collected by the outer needle that is subsequently fired, and as a result, the biological tissue voluntarily enters the concave portion of the inner needle. Compared with the conventional biopsy needle device which is the premise, it is possible to dramatically reduce the probability of failure to collect biological tissue. Further, by generating a negative pressure in the concave portion of the inner needle, body fluid is sucked into the hollow portion of the inner needle or the cylinder, so that body fluid can be collected simultaneously with the living tissue.
According to the invention of claim 2, the same effect as that of claim 1 can be obtained. In addition, since a piston stopper is provided to limit the backward movement of the piston during the backward operation of the inner needle holding member, and to accumulate the piston backward spring while moving the piston forward relative to the cylinder, the backward operation of the inner needle holding member. Accordingly, the movement of the piston and the accumulation of the piston retraction spring can be realized with a simple configuration.
Further, according to the invention of claim 3, it is possible to confirm the state of collecting body fluid from the outside of the housing through the body fluid collection confirmation window.

本発明の実施形態に係る生検針装置の初期状態を示す平面図である。It is a top view which shows the initial state of the biopsy needle apparatus which concerns on embodiment of this invention. 本発明の実施形態に係る生検針装置の初期状態を示す側面図である。It is a side view which shows the initial state of the biopsy needle apparatus which concerns on embodiment of this invention. （Ａ）は本発明の実施形態に係る生検針装置の初期状態を示す側断面図、（Ｂ）は該状態における針先部を示す拡大側面図である。(A) is a side sectional view showing an initial state of a biopsy needle device according to an embodiment of the present invention, and (B) is an enlarged side view showing a needle tip portion in the state. （Ａ）は本発明の実施形態に係る生検針装置の蓄勢状態を示す側断面図、（Ｂ）は該状態における針先部を示す拡大側面図である。(A) is a side sectional view showing a stored state of a biopsy needle device according to an embodiment of the present invention, (B) is an enlarged side view showing a needle tip portion in this state. （Ａ）は本発明の実施形態に係る生検針装置の内針発射状態を示す側断面図、（Ｂ）は該状態における針先部を示す拡大側面図である。(A) is a side sectional view showing an inner needle firing state of the biopsy needle device according to the embodiment of the present invention, and (B) is an enlarged side view showing a needle tip portion in the state. （Ａ）は本発明の実施形態に係る生検針装置のピストン後退状態を示す側断面図、（Ｂ）は該状態における針先部を示す拡大側面図である。(A) is a sectional side view showing the piston retracted state of the biopsy needle device according to the embodiment of the present invention, and (B) is an enlarged side view showing the needle tip portion in this state. （Ａ）は本発明の実施形態に係る生検針装置の外針発射状態を示す側断面図、（Ｂ）は該状態における針先部を示す拡大側面図である。(A) is a side sectional view showing an outer needle firing state of the biopsy needle device according to the embodiment of the present invention, and (B) is an enlarged side view showing a needle tip portion in the state. （Ａ）は本発明の実施形態に係る生検針装置の生体組織取り出し状態を示す側断面図、（Ｂ）は該状態における針先部を示す拡大側面図である。(A) is a sectional side view showing a biological tissue removal state of a biopsy needle device according to an embodiment of the present invention, and (B) is an enlarged side view showing a needle tip part in this state.

以下、本発明の実施の形態について、図面に基づいて説明する。図面において、１は生体組織を採取する際に使用される生検針装置であって、該生検針装置１は、先端近傍の外周部に凹部２ａを有する内針２と、内針２に対して長さ方向摺動自在に外嵌する円筒状の外針３と、内針２の基端部を保持する内針保持部材４と、外針３の基端部を保持する外針保持部材５と、内針保持部材４及び外針保持部材５を進退自在に収容する筐体６と、内針保持部材４及び外針保持部材５を後退操作する後退操作手段７と、後退操作された内針保持部材４を所定の発射待機位置で係止する内針係止手段８と、後退操作された外針保持部材５を所定の発射待機位置で係止する外針係止手段９と、内針係止手段８及び外針係止手段９を順次係止解除する係止解除操作手段１０と、内針保持部材４の後退操作に応じて蓄勢され、内針係止手段８の係止解除操作に応じて内針２を前進方向に発射させる内針発射バネ１１と、外針保持部材５の後退操作に応じて蓄勢され、外針係止手段９の係止解除操作に応じて外針３を前進方向に発射させる外針発射バネ１２と、を備えており、内針２の発射後に該内針２の凹部２ａに入り込んだ生体組織を外針３の発射により切断採取するように構成されている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a biopsy needle device used when a biological tissue is collected. The biopsy needle device 1 has an inner needle 2 having a recess 2a in the outer peripheral portion near the tip, and an inner needle 2. A cylindrical outer needle 3 that is slidably fitted in the longitudinal direction, an inner needle holding member 4 that holds the proximal end portion of the inner needle 2, and an outer needle holding member 5 that holds the proximal end portion of the outer needle 3. A housing 6 that accommodates the inner needle holding member 4 and the outer needle holding member 5 so as to be able to move forward and backward, a retraction operation means 7 that retreats the inner needle holding member 4 and the outer needle holding member 5, and a retreated inner Inner needle locking means 8 for locking the needle holding member 4 at a predetermined firing standby position, outer needle locking means 9 for locking the retracted outer needle holding member 5 at a predetermined firing standby position, The lock release operation means 10 for sequentially releasing the needle lock means 8 and the outer needle lock means 9 and the retracting operation of the inner needle holding member 4 are accumulated. An inner needle firing spring 11 that fires the inner needle 2 in the forward direction according to the unlocking operation of the inner needle locking means 8, and the energy stored according to the backward operation of the outer needle holding member 5, and the outer needle locking means And an outer needle firing spring 12 that fires the outer needle 3 in the forward direction in response to the unlocking operation of the inner needle 9, and after the inner needle 2 is fired, the living tissue that has entered the recess 2a of the inner needle 2 is removed. It is configured to cut and collect by firing the needle 3.

さらに、本発明の実施形態に係る生検針装置１では、内針２が中空部２ｂを有する円筒針となっている。また、内針保持部材４は、内針２の中空部２ｂを介して凹部２ａと連通するシリンダ１３と、シリンダ１３に進退自在に内装されるピストン１４と、ピストン１４をシリンダ１３に対して後退方向に付勢可能なピストン後退バネ１５と、ピストン１４を所定の後退待機位置で係止するピストン係止手段１６と、を備えている。また、筐体６は、内針保持部材４の後退操作時にピストン１４の後退を制限し、該ピストン１４をシリンダ１３に対して相対的に前進させつつピストン後退バネ１５を蓄勢させるピストンストッパ１７を備えている。そして、係止解除操作手段１０は、内針係止手段８、ピストン係止手段１６及び外針係止手段９を順次係止解除することが可能であり、内針係止手段８の係止解除操作に応じた内針２の発射後、ピストン係止手段１６の係止解除操作に応じてピストン後退バネ１５がピストン１４を後退させることにより、内針２の凹部２ａに負圧を発生させて該凹部２ａ内に生体組織を吸引し、その後、外針係止手段９の係止解除操作に応じて外針３を発射させて凹部２ａに入り込んだ生体組織を切断採取するように構成されている。以下、生検針装置１を構成する各種の部品及び手段について詳細に説明する。   Furthermore, in the biopsy needle device 1 according to the embodiment of the present invention, the inner needle 2 is a cylindrical needle having a hollow portion 2b. Further, the inner needle holding member 4 includes a cylinder 13 that communicates with the recess 2 a through the hollow portion 2 b of the inner needle 2, a piston 14 that is housed in the cylinder 13 so as to be able to advance and retract, and a piston 14 that moves backward with respect to the cylinder 13. A piston retraction spring 15 capable of being biased in the direction and a piston locking means 16 for locking the piston 14 at a predetermined retraction standby position are provided. Further, the housing 6 restricts the retraction of the piston 14 during the retreating operation of the inner needle holding member 4, and a piston stopper 17 that stores the piston retraction spring 15 while advancing the piston 14 relative to the cylinder 13. It has. The unlocking operation means 10 can sequentially unlock the inner needle locking means 8, the piston locking means 16, and the outer needle locking means 9, and the inner needle locking means 8 is locked. After firing the inner needle 2 in response to the release operation, the piston retraction spring 15 retracts the piston 14 in response to the unlocking operation of the piston locking means 16, thereby generating a negative pressure in the recess 2 a of the inner needle 2. The living tissue is sucked into the recess 2a, and then the outer needle 3 is fired in response to the unlocking operation of the outer needle locking means 9 to cut and collect the living tissue that has entered the recess 2a. ing. Hereinafter, various parts and means constituting the biopsy needle device 1 will be described in detail.

内針２は、中空部２ｂを有する円筒針であり、その先端部は、中空部２ｂを塞ぐとともに、生体への刺入を可能にすべく先鋭状に形成されている。また、内針２は、先端部近傍の外周部に凹部２ａを有する。凹部２ａは、生体への刺入後、生体組織を入り込ませて採取するためのものであり、内針２の中空部２ｂは、この凹部２ａを介して上方に開口している。   The inner needle 2 is a cylindrical needle having a hollow portion 2b, and the tip end portion thereof is formed in a sharp shape so as to block the hollow portion 2b and allow insertion into a living body. Further, the inner needle 2 has a concave portion 2a in the outer peripheral portion near the tip portion. The concave portion 2a is for collecting a living tissue after being inserted into the living body, and the hollow portion 2b of the inner needle 2 is opened upward through the concave portion 2a.

外針３も、中空部３ａを有する筒状針であり、内針２に対して長さ方向摺動自在に外嵌している。外針３の先端部は、内針２の突出を許容すべく開口されるとともに、生体への刺入や、内針２の凹部２ａに入り込んだ生体組織の切断採取を可能にすべく先鋭状に形成されている。   The outer needle 3 is also a cylindrical needle having a hollow portion 3a, and is externally fitted to the inner needle 2 so as to be slidable in the length direction. The distal end portion of the outer needle 3 is opened to allow the inner needle 2 to protrude, and is sharpened so as to allow insertion into the living body and cutting and collection of living tissue that has entered the recess 2a of the inner needle 2. Is formed.

内針保持部材４は、前後に仕切られた筐体６の前室６ａ及び後室６ｂのうち、後室６ｂに進退自在に収容されている。内針保持部材４は、内針２の基端部を保持し、かつ中空部２ｂを介して先端側の凹部２ａと連通するシリンダ１３を備える。シリンダ１３の内部には、進退自在なピストン１４と、該ピストン１４をシリンダ１３に対して後退方向に付勢可能な圧縮コイルスプリングからなるピストン後退バネ１５とが内装されている。なお、本実施形態のシリンダ１３は、透明な樹脂で形成されており、その内部が目視可能となっている。   The inner needle holding member 4 is accommodated in the rear chamber 6b among the front chamber 6a and the rear chamber 6b of the housing 6 partitioned in the front-rear direction. The inner needle holding member 4 includes a cylinder 13 that holds the proximal end portion of the inner needle 2 and communicates with the concave portion 2a on the distal end side through the hollow portion 2b. Inside the cylinder 13 are housed a piston 14 that can be moved forward and backward, and a piston retracting spring 15 that is a compression coil spring that can bias the piston 14 in the retracting direction with respect to the cylinder 13. In addition, the cylinder 13 of this embodiment is formed with transparent resin, and the inside is visible.

さらに、シリンダ１３とピストン１４との間には、ピストン１４を所定の後退待機位置で係止するピストン係止手段１６が構成されている。本実施形態のピストン係止手段１６は、ピストン１４から後方に延出する係止桿１４ａの中間部に形成された係止爪１４ｂと、シリンダ１３の筒部に形成された係止孔１３ａとから構成されており、その係止解除操作は、係止桿１４ａの先端部を係止解除操作手段１０の第２係止解除凸部１０ａで上方に持ち上げることにより行われる。   Furthermore, between the cylinder 13 and the piston 14, a piston locking means 16 for locking the piston 14 at a predetermined backward standby position is configured. The piston locking means 16 of the present embodiment includes a locking claw 14b formed in an intermediate portion of a locking rod 14a extending rearward from the piston 14, and a locking hole 13a formed in a cylinder portion of the cylinder 13. The unlocking operation is performed by lifting the tip of the locking rod 14a upward by the second unlocking projection 10a of the unlocking operation means 10.

外針保持部材５は、筐体６の前室６ａに進退自在に収容され、外針３の基端部を保持している。外針保持部材５には、後方に延出する筒状の延出部５ａが形成されており、その先端に形成されるフランジ部５ｂは、外針手動後退操作具１８に後方から係合している。   The outer needle holding member 5 is housed in the front chamber 6 a of the housing 6 so as to be able to advance and retract, and holds the proximal end portion of the outer needle 3. The outer needle holding member 5 is formed with a cylindrical extension portion 5a extending rearward, and a flange portion 5b formed at the tip of the outer needle holding member 5 engages with the outer needle manual retraction operation tool 18 from the rear. ing.

外針手動後退操作具１８は、図１に示すように、筐体６に形成されるＬ字状のガイド孔６ｃを介して筐体６の上面側に突出する操作凸部１８ａを有する。操作凸部１８ａは、通常、ガイド孔６ｃの前端部に形成される係止溝部６ｄに位置することにより、外針手動後退操作具１８の前後移動を規制する一方、生体組織を採取した後、内針２の凹部２ａから生体組織を取り出す際には、係止溝部６ｄからガイド孔６ｃに沿って後方に操作することにより、手動による外針３の後退操作を可能にする。なお、生検針装置１は、操作凸部１８ａを係止溝部６ｄに向けて付勢するバネを備えるが、その図示は省略する。   As shown in FIG. 1, the outer needle manual retraction operation tool 18 has an operation projection 18 a that protrudes to the upper surface side of the housing 6 through an L-shaped guide hole 6 c formed in the housing 6. The operation convex portion 18a is normally positioned in the locking groove portion 6d formed at the front end portion of the guide hole 6c, thereby restricting the forward / backward movement of the outer needle manual retraction operation tool 18, while collecting the biological tissue, When the biological tissue is taken out from the concave portion 2a of the inner needle 2, it is possible to manually move the outer needle 3 backward by operating backward from the locking groove 6d along the guide hole 6c. The biopsy needle device 1 includes a spring that biases the operation convex portion 18a toward the locking groove portion 6d, but the illustration thereof is omitted.

筐体６は、生検針装置１の各種の部材や手段を収容する樹脂製のケースであり、その上面部から前方に向けて内針２及び外針３が突出する一方、後面部から係止解除操作手段１０の後端部が突出している。また、筐体６の上面部には、外針手動後退操作具１８の操作凸部１８ａが突出するとともに、筐体６の外部からシリンダ１３の内部を目視可能にする体液採取確認窓６ｅが形成されている。   The housing 6 is a resin case that houses various members and means of the biopsy needle device 1. The inner needle 2 and the outer needle 3 protrude forward from the upper surface portion of the case 6, while being locked from the rear surface portion. The rear end portion of the release operation means 10 protrudes. In addition, an operation convex portion 18a of the outer needle manual retraction operation tool 18 protrudes from the upper surface portion of the housing 6 and a body fluid collection confirmation window 6e that allows the inside of the cylinder 13 to be viewed from the outside of the housing 6 is formed. Has been.

後退操作手段７は、生体組織の採取に先立ち、内針保持部材４及び外針保持部材５を発射待機位置まで後退操作するために設けられる。本実施形態の後退操作手段７は、筐体６の左右内側面に沿って前後スライド自在に設けられる左右一対の内部スライド部材１９と、筐体６の上面及び左右外側面に沿って前後スライド自在に設けられる外部スライド部材２０とを備えて構成されている。   The retracting operation means 7 is provided for retracting the inner needle holding member 4 and the outer needle holding member 5 to the firing standby position prior to collection of the living tissue. The backward operation means 7 of this embodiment is slidable back and forth along a pair of left and right internal slide members 19 provided to be slidable back and forth along the left and right inner surfaces of the housing 6, and along the upper surface and left and right outer surfaces of the housing 6. And an external slide member 20 provided on the outside.

内部スライド部材１９には、内針保持部材４（シリンダ１３）の前端部に前方から係合する係合爪１９ａと、外針保持部材５の前端部に前方から係合する係合爪１９ｂと、筐体６から突出して外部スライド部材２０に連結される連結部１９ｃとが形成されており、外部スライド部材２０を筐体６に対して後退方向にスライド操作すると、内部スライド部材１９を介して内針保持部材４及び外針保持部材５を発射待機位置まで後退操作することができる。   The inner slide member 19 includes an engaging claw 19a that engages with the front end of the inner needle holding member 4 (cylinder 13) from the front, and an engaging claw 19b that engages with the front end of the outer needle holding member 5 from the front. A connecting portion 19c that protrudes from the housing 6 and is connected to the external slide member 20 is formed. When the external slide member 20 is slid in the backward direction with respect to the housing 6, the internal slide member 19 is interposed. The inner needle holding member 4 and the outer needle holding member 5 can be retracted to the firing standby position.

また、本実施形態では、内針保持部材４の後退操作に応じてピストン１４を後退待機位置に移動させる。つまり、本実施形態の筐体６は、後室６ｂの後端部からピストン１４に向けて突出するピストンストッパ１７を備えており、このピストンストッパ１７は、内針保持部材４の後退操作時にピストン１４の後退を制限し、該ピストン１４をシリンダ１３に対して相対的に後退待機位置まで前進させつつ、ピストン後退バネ１５を圧縮して蓄勢させる。   In the present embodiment, the piston 14 is moved to the backward standby position in accordance with the backward operation of the inner needle holding member 4. That is, the housing 6 of the present embodiment includes a piston stopper 17 that protrudes from the rear end portion of the rear chamber 6 b toward the piston 14, and this piston stopper 17 is a piston when the inner needle holding member 4 is retracted. 14 is restricted, and the piston 14 is moved forward to a backward standby position relative to the cylinder 13 while the piston backward spring 15 is compressed and stored.

内針係止手段８は、後退操作された内針保持部材４（シリンダ１３）を所定の発射待機位置で係止する。本実施形態の内針係止手段８は、内針保持部材４の下端部から後方に延設された係止爪４ａと、筐体６に形成された係止部６ｆとで構成されている。   The inner needle locking means 8 locks the retracted inner needle holding member 4 (cylinder 13) at a predetermined firing standby position. The inner needle locking means 8 of the present embodiment is configured by a locking claw 4 a extending rearward from the lower end portion of the inner needle holding member 4 and a locking portion 6 f formed on the housing 6. .

外針係止手段９は、後退操作された外針保持部材５を所定の発射待機位置で係止する。本実施形態の外針係止手段９は、外針保持部材５の下端部から後方に延設された係止爪５ｃと、筐体６に形成された係止部６ｇとで構成されている。   The outer needle locking means 9 locks the retracted outer needle holding member 5 at a predetermined firing standby position. The outer needle locking means 9 of the present embodiment is configured by a locking claw 5 c extending rearward from the lower end portion of the outer needle holding member 5 and a locking portion 6 g formed in the housing 6. .

係止解除操作手段１０は、内針係止手段８、ピストン係止手段１６及び外針係止手段９を順次係止解除することが可能である。本実施形態の係止解除操作手段１０は、筐体６の下部に前後スライド自在に収容された棒状部材であり、筐体６から突出する後端部の押し引き操作に基いて内針係止手段８、ピストン係止手段１６及び外針係止手段９を順次係止解除するようになっている。   The unlocking operation means 10 can release the inner needle locking means 8, the piston locking means 16 and the outer needle locking means 9 in order. The unlocking operation means 10 of the present embodiment is a rod-like member housed in the lower part of the housing 6 so as to be slidable back and forth, and the inner needle is locked based on the push-pull operation of the rear end protruding from the housing 6. The means 8, the piston locking means 16 and the outer needle locking means 9 are sequentially released.

具体的に説明すると、係止解除操作手段１０には、後側から順番に第１係止解除凸部１０ｂ、第２係止解除凸部１０ａ及び第３係止解除凸部１０ｃが形成されており、最初の押し操作（押し込み量小）に基いて第１係止解除凸部１０ｂが内針保持部材４の係止爪４ａを持ち上げることにより内針係止手段８の係止解除を行う。なお、第１係止解除凸部１０ｂと筐体６の係止部６ｆとは、左右に位置ずれしているため、係止部６ｆによって係止解除操作手段１０のスライド操作が規制されることはない。   More specifically, the unlocking operation means 10 is formed with a first unlocking projection 10b, a second unlocking projection 10a, and a third unlocking projection 10c in order from the rear side. The first locking release projection 10b lifts the locking claw 4a of the inner needle holding member 4 based on the first pushing operation (small pushing amount), thereby releasing the locking of the inner needle locking means 8. In addition, since the 1st latch release convex part 10b and the latching | locking part 6f of the housing | casing 6 have shifted | deviated to right and left, the sliding operation of the latch release operation means 10 is controlled by the latching part 6f. There is no.

つぎに、係止解除操作手段１０を引き操作すると、第２係止解除凸部１０ａが係止桿１４ａを介してピストン１４の係止爪１４ｂを持ち上げることによりピストン係止手段１６の係止解除が行われる。なお、第２係止解除凸部１０ａと内針保持部材４の係止爪４ａとは、左右に位置ずれしているため、係止爪４ａによって係止解除操作手段１０のスライド操作が規制されることはない。   Next, when the lock release operation means 10 is pulled, the second lock release convex portion 10a lifts the lock claw 14b of the piston 14 via the lock rod 14a, thereby releasing the lock of the piston lock means 16. Is done. In addition, since the 2nd latch release convex part 10a and the latching claw 4a of the inner needle holding member 4 are displaced in the right and left, the sliding operation of the latch release operation means 10 is regulated by the latching claw 4a. Never happen.

最後に、係止解除操作手段１０を再度押し操作（押し込み量大）すると、第３係止解除凸部１０ｃが外針保持部材５の係止爪５ｃを持ち上げることにより外針係止手段９の係止解除が行われる。   Finally, when the lock release operation means 10 is pushed again (large push-in amount), the third lock release convex portion 10c lifts the lock claw 5c of the outer needle holding member 5 and thereby the outer needle lock means 9 Unlocking is performed.

内針発射バネ１１は、圧縮コイルスプリングであり、内針保持部材４（シリンダ１３）の後端と筐体６の後部壁との間に介設されている。そして、内針発射バネ１１は、内針保持部材４の後退操作に応じて蓄勢され、内針係止手段８の係止解除操作に応じて内針２を前進方向に発射させる。   The inner needle firing spring 11 is a compression coil spring and is interposed between the rear end of the inner needle holding member 4 (cylinder 13) and the rear wall of the housing 6. The inner needle firing spring 11 is stored in accordance with the backward operation of the inner needle holding member 4 and fires the inner needle 2 in the forward direction in accordance with the unlocking operation of the inner needle locking means 8.

外針発射バネ１２は、圧縮コイルスプリングであり、外針保持部材５の後端と外針手動後退操作具１８との間に介設されている。そして、外針発射バネ１２は、外針保持部材５の後退操作に応じて蓄勢され、外針係止手段９の係止解除操作に応じて外針３を前進方向に発射させる。   The outer needle firing spring 12 is a compression coil spring, and is interposed between the rear end of the outer needle holding member 5 and the outer needle manual retraction operation tool 18. The outer needle firing spring 12 is stored in accordance with the backward operation of the outer needle holding member 5 and fires the outer needle 3 in the forward direction in accordance with the unlocking operation of the outer needle locking means 9.

つぎに、本発明の実施形態に係る生検針装置１の操作及び動作について図面を参照しつつ説明する。   Next, the operation and operation of the biopsy needle device 1 according to the embodiment of the present invention will be described with reference to the drawings.

図１〜図３に示すように、初期状態の生検針装置１では、外針手動後退操作具１８の操作凸部１８ａが筐体６の係止溝部６ｄに位置し、内針保持部材４及び外針保持部材５が前進位置にあり、ピストン１４がシリンダ１３に対して後退した位置にあり、すべてのバネ１１、１２、１５が解放状態となっている。   As shown in FIGS. 1 to 3, in the biopsy needle device 1 in the initial state, the operation convex portion 18 a of the outer needle manual retraction operation tool 18 is located in the locking groove portion 6 d of the housing 6, and the inner needle holding member 4 and The outer needle holding member 5 is in the forward position, the piston 14 is in the position retracted with respect to the cylinder 13, and all the springs 11, 12, 15 are in the released state.

初期状態の生検針装置１において、外部スライド部材２０を後方へスライド操作すると、内部スライド部材１９が内針保持部材４及び外針保持部材５を後退させる。内針保持部材４及び外針保持部材５が後退すると、内針発射バネ１１及び外針発射バネ１２が蓄勢されるとともに、所定の発射待機位置まで到達した時点で内針係止手段８及び外針係止手段９で係止される。また、ピストン１４は、内針保持部材４の後退に伴ってピストンストッパ１７に当接することにより、シリンダ１３に対して相対的に後退待機位置まで前進しつつ、ピストン後退バネ１５を圧縮して蓄勢させ、ピストン係止手段１６で係止される。図４は、すべてのバネ１１、１２、１５の蓄勢が完了した状態を示しており、このとき内針２は、先端部のみが外針３の先端から突出し、凹部２ａは外針３の中に位置している。   When the external slide member 20 is slid backward in the biopsy needle device 1 in the initial state, the internal slide member 19 retracts the inner needle holding member 4 and the outer needle holding member 5. When the inner needle holding member 4 and the outer needle holding member 5 are retracted, the inner needle firing spring 11 and the outer needle firing spring 12 are energized, and when the inner needle retaining means 8 and the outer needle retaining member 5 reach a predetermined firing standby position, It is locked by the outer needle locking means 9. Further, the piston 14 abuts on the piston stopper 17 as the inner needle holding member 4 moves backward, thereby compressing and storing the piston retracting spring 15 while moving forward relative to the cylinder 13 to the backward standby position. And is locked by the piston locking means 16. FIG. 4 shows a state in which the accumulation of all the springs 11, 12, 15 is completed. At this time, only the tip of the inner needle 2 protrudes from the tip of the outer needle 3, and the recess 2 a corresponds to the outer needle 3. Located inside.

つぎに、図４に示す状態で内針２及び外針３を生体に刺入させる。内針２及び外針３の先端部が所定の組織採取位置に到達したら、係止解除操作手段１０を押し操作する。係止解除操作手段１０を押し操作すると、その第１係止解除凸部１０ｂが内針保持部材４の係止爪４ａを持ち上げることにより内針係止手段８の係止が解除される。内針係止手段８の係止が解除されると、内針発射バネ１１の蓄勢力で内針保持部材４が前進し、内針保持部材４と一体の内針２が前進方向に発射される。図５に示すように、内針２を発射すると、内針２の先端側が外針３の先端から飛び出し、内針２の凹部２ａが生体組織内に露出される。   Next, the inner needle 2 and the outer needle 3 are inserted into the living body in the state shown in FIG. When the distal ends of the inner needle 2 and the outer needle 3 reach a predetermined tissue collection position, the locking release operation means 10 is pushed. When the unlocking operation means 10 is pushed, the first unlocking projection 10b lifts the locking claw 4a of the inner needle holding member 4 so that the locking of the inner needle locking means 8 is released. When the locking of the inner needle locking means 8 is released, the inner needle holding member 4 is advanced by the stored force of the inner needle firing spring 11, and the inner needle 2 integral with the inner needle holding member 4 is fired in the forward direction. Is done. As shown in FIG. 5, when the inner needle 2 is fired, the distal end side of the inner needle 2 jumps out from the distal end of the outer needle 3, and the recess 2a of the inner needle 2 is exposed in the living tissue.

つぎに、係止解除操作手段１０を引き操作する。係止解除操作手段１０を引き操作すると、その第２係止解除凸部１０ｃがピストン１４の係止桿１４ａを持ち上げることによりピストン係止手段１６の係止が解除される。ピストン係止手段１６の係止が解除されると、ピストン後退バネ１５の蓄勢力でピストン１４がシリンダ１３に対して後退する。図６に示すように、ピストン１４が後退すると、中空部２ｂを介してシリンダ１３と連通された内針２の凹部２ａに負圧が発生し、凹部２ａ内に生体組織が吸引されるとともに、体液が内針２の中空部２ｂを介してシリンダ１３内に吸い込まれる。シリンダ１３内に吸い込まれた体液は、筐体６の体液採取確認窓６ｅを介して目視で確認することができる。   Next, the unlocking operation means 10 is pulled. When the lock release operation means 10 is pulled, the second lock release convex portion 10c lifts the lock rod 14a of the piston 14, and the lock of the piston lock means 16 is released. When the locking of the piston locking means 16 is released, the piston 14 is retracted with respect to the cylinder 13 by the stored force of the piston retracting spring 15. As shown in FIG. 6, when the piston 14 is retracted, negative pressure is generated in the concave portion 2a of the inner needle 2 communicated with the cylinder 13 through the hollow portion 2b, and the living tissue is sucked into the concave portion 2a. Body fluid is sucked into the cylinder 13 through the hollow portion 2 b of the inner needle 2. The body fluid sucked into the cylinder 13 can be visually confirmed through the body fluid collection confirmation window 6e of the housing 6.

つぎに、係止解除操作手段１０を再び押し操作する。係止解除操作手段１０を再び押し操作すると、その第３係止解除凸部１０ｃが外針保持部材５の係止爪５ｃを持ち上げることにより外針係止手段９の係止が解除される。外針係止手段９の係止が解除されると、外針発射バネ１２の蓄勢力で外針保持部材５が前進し、外針保持部材５と一体の外針３が前進方向に発射される。図７に示すように、外針３を発射すると、外針３の先端が内針２の外周に沿って先進することにより、内針２の凹部２ａに入り込んだ生体組織が切断採取される。   Next, the latch release operation means 10 is pushed again. When the unlocking operation means 10 is pushed again, the third locking release projection 10c lifts the locking claw 5c of the outer needle holding member 5 to release the locking of the outer needle locking means 9. When the locking of the outer needle locking means 9 is released, the outer needle holding member 5 moves forward by the stored force of the outer needle firing spring 12, and the outer needle 3 integral with the outer needle holding member 5 is fired in the forward direction. Is done. As shown in FIG. 7, when the outer needle 3 is fired, the distal end of the outer needle 3 advances along the outer periphery of the inner needle 2, so that the living tissue that has entered the recess 2 a of the inner needle 2 is cut and collected.

外針３の発射後、内針２及び外針３を生体から引き抜き、採取した生体組織の取り出しを取り出しを行う。図８に示すように、生体組織を取り出す際には、外針手動後退操作具１８の操作凸部１８ａをガイド孔６ｃに沿って後方に操作する。この操作を行うと、外針保持部材５及び外針３が後退し、内針２の凹部２ａが露出状態になるので、凹部２ａ内の生体組織を取り出すことが可能になる。なお、シリンダ１３内の体液は、ピストン１４の前進操作に基いて内針２の先端側から取り出してもよいし、筐体６を分解して取り出すようにしてもよい。   After the outer needle 3 is fired, the inner needle 2 and the outer needle 3 are pulled out from the living body, and the collected living tissue is taken out. As shown in FIG. 8, when the biological tissue is taken out, the operation convex portion 18a of the outer needle manual retraction operation tool 18 is operated rearward along the guide hole 6c. When this operation is performed, the outer needle holding member 5 and the outer needle 3 are retracted, and the concave portion 2a of the inner needle 2 is exposed, so that the living tissue in the concave portion 2a can be taken out. The body fluid in the cylinder 13 may be taken out from the distal end side of the inner needle 2 based on the forward operation of the piston 14 or may be taken out by disassembling the housing 6.

叙述の如く構成された本実施形態によれば、内針２の発射後、ピストン係止手段１６の係止解除操作に応じてピストン後退バネ１５がピストン１４を後退させることにより、内針２の凹部２ａに負圧を発生させて該凹部２ａ内に生体組織を吸い込むので、その後に発射される外針３によって凹部２ａに入り込んだ生体組織を確実に切断採取することができ、その結果、内針２の凹部２ａに生体組織が自主的に入り込むことを前提としている従来の生検針装置に比べ、生体組織の採取に失敗する確率を飛躍的に低減させることが可能になる。   According to the present embodiment configured as described, after the inner needle 2 is fired, the piston retracting spring 15 retracts the piston 14 in accordance with the unlocking operation of the piston locking means 16, so that the inner needle 2 Since a negative pressure is generated in the recess 2a and the living tissue is sucked into the recess 2a, the living tissue that has entered the recess 2a can be reliably cut and collected by the outer needle 3 that is fired thereafter. Compared to a conventional biopsy needle device that presupposes that the biological tissue voluntarily enters the recess 2a of the needle 2, the probability of failure in collecting the biological tissue can be drastically reduced.

また、内針２の凹部２ａに負圧を発生させることにより、内針２の中空部２ｂやシリンダ１３内に体液が吸い込まれるので、生体組織と同時に体液の採取も可能になる。   Further, by generating a negative pressure in the recess 2a of the inner needle 2, body fluid is sucked into the hollow portion 2b of the inner needle 2 and the cylinder 13, so that body fluid can be collected simultaneously with the living tissue.

また、内針保持部材４の後退操作時にピストン１４の後退を制限し、該ピストン１４をシリンダ１３に対して相対的に前進させつつピストン後退バネ１５を蓄勢させるピストンストッパ１７を備えるので、内針保持部材４の後退操作に応じたピストン１４の移動やピストン後退バネ１５の蓄勢を簡単な構成で実現することができる。   Further, since the piston 14 is retracted when the inner needle holding member 4 is retracted and the piston 14 is moved forward relative to the cylinder 13, the piston stopper 17 is provided to store the piston retracting spring 15. The movement of the piston 14 and the accumulation of the piston retraction spring 15 according to the retraction operation of the needle holding member 4 can be realized with a simple configuration.

また、筐体６の外部からシリンダ１３の内部を目視可能にする体液採取確認窓６ｅを備えるので、体液の採取状況を容易に確認することができる。   In addition, since the body fluid collection confirmation window 6e that allows the inside of the cylinder 13 to be viewed from the outside of the housing 6 is provided, the body fluid collection state can be easily confirmed.

１ 生検針装置
２ 内針
２ａ 凹部
２ｂ 中空部
３ 外針
４ 内針保持部材
５ 外針保持部材
６ 筐体
６ｅ 体液採取確認窓
７ 後退操作手段
８ 内針係止手段
９ 外針係止手段
１０ 係止解除操作手段
１１ 内針発射バネ
１２ 外針発射バネ
１３ シリンダ
１４ ピストン
１５ ピストン後退バネ
１６ ピストン係止手段
１７ ピストンストッパ
DESCRIPTION OF SYMBOLS 1 Biopsy needle apparatus 2 Inner needle 2a Recessed part 2b Hollow part 3 Outer needle 4 Inner needle holding member 5 Outer needle holding member 6 Case 6e Body fluid collection confirmation window 7 Retraction operation means 8 Inner needle locking means 9 Outer needle locking means 10 Unlocking operation means 11 Inner needle firing spring 12 Outer needle firing spring 13 Cylinder 14 Piston 15 Piston retraction spring 16 Piston locking means 17 Piston stopper

Claims (3)

先端近傍の外周部に凹部を有する内針と、
前記内針に対して長さ方向摺動自在に外嵌する円筒状の外針と、
前記内針の基端部を保持する内針保持部材と、
前記外針の基端部を保持する外針保持部材と、
前記内針保持部材及び前記外針保持部材を進退自在に収容する筐体と、
前記内針保持部材及び前記外針保持部材を後退操作する後退操作手段と、
後退操作された前記内針保持部材を所定の発射待機位置で係止する内針係止手段と、
後退操作された前記外針保持部材を所定の発射待機位置で係止する外針係止手段と、
前記内針係止手段及び前記外針係止手段を順次係止解除する係止解除操作手段と、
前記内針保持部材の後退操作に応じて蓄勢され、前記内針係止手段の係止解除操作に応じて前記内針を前進方向に発射させる内針発射バネと、
前記外針保持部材の後退操作に応じて蓄勢され、前記外針係止手段の係止解除操作に応じて前記外針を前進方向に発射させる外針発射バネと、を備え、
前記内針の発射後に前記凹部に入り込んだ生体組織を前記外針の発射により切断採取する生検針装置であって、
前記内針は、中空部を有する円筒針であり、
前記内針保持部材は、
前記内針の中空部を介して前記凹部と連通するシリンダと、
前記シリンダに進退自在に内装されるピストンと、
前記ピストンを所定の後退待機位置で係止するピストン係止手段と、
前記内針保持部材の後退操作に応じて蓄勢され、前記ピストン係止手段の係止解除操作に応じて前記ピストンを前記シリンダに対して後退させるピストン後退バネと、を備え、
前記係止解除操作手段は、
前記内針係止手段、前記ピストン係止手段及び前記外針係止手段を順次係止解除することが可能であり、
前記内針係止手段の係止解除操作に応じた前記内針の発射後、前記ピストン係止手段の係止解除操作に応じて前記ピストン後退バネが前記ピストンを後退させることにより、前記内針の凹部に負圧を発生させて該凹部内に生体組織を吸引し、その後、前記外針係止手段の係止解除操作に応じて前記外針を発射させて前記凹部に入り込んだ生体組織を切断採取することを特徴とする生検針装置。 An inner needle having a recess in the outer periphery near the tip;
A cylindrical outer needle that is externally fitted to the inner needle so as to be slidable in the longitudinal direction;
An inner needle holding member for holding a proximal end portion of the inner needle;
An outer needle holding member for holding a proximal end portion of the outer needle;
A housing for accommodating the inner needle holding member and the outer needle holding member so as to freely advance and retract;
Retreat operation means for retreating the inner needle holding member and the outer needle holding member;
Inner needle locking means for locking the inner needle holding member that has been operated backward at a predetermined firing standby position;
Outer needle locking means for locking the outer needle holding member that has been retracted at a predetermined firing standby position;
Unlocking operation means for sequentially unlocking the inner needle locking means and the outer needle locking means;
An inner needle firing spring that is stored in accordance with a backward operation of the inner needle holding member and fires the inner needle in a forward direction in accordance with an unlocking operation of the inner needle locking means;
An outer needle firing spring that is stored in accordance with a backward operation of the outer needle holding member and that fires the outer needle in a forward direction in accordance with an unlocking operation of the outer needle locking means;
A biopsy needle device that cuts and collects biological tissue that has entered the recess after firing the inner needle by firing the outer needle,
The inner needle is a cylindrical needle having a hollow part,
The inner needle holding member is
A cylinder communicating with the recess through the hollow portion of the inner needle;
A piston mounted in the cylinder so as to freely advance and retract;
Piston locking means for locking the piston at a predetermined backward standby position;
A piston retraction spring that is stored in accordance with a retraction operation of the inner needle holding member and retreats the piston with respect to the cylinder in accordance with a lock release operation of the piston locking means;
The unlocking operation means is
The inner needle locking means, the piston locking means and the outer needle locking means can be unlocked sequentially,
After the inner needle is fired according to the unlocking operation of the inner needle locking means, the piston retraction spring retracts the piston according to the unlocking operation of the piston locking means, so that the inner needle A negative pressure is generated in the concave portion of the body to suck the biological tissue into the concave portion, and then the outer needle is fired in response to the unlocking operation of the outer needle locking means to enter the biological tissue that has entered the concave portion. A biopsy needle device characterized by cutting and collecting. 先端近傍の外周部に凹部を有する内針と、
前記内針に対して長さ方向摺動自在に外嵌する円筒状の外針と、
前記内針の基端部を保持する内針保持部材と、
前記外針の基端部を保持する外針保持部材と、
前記内針保持部材及び前記外針保持部材を進退自在に収容する筐体と、
前記内針保持部材及び前記外針保持部材を後退操作する後退操作手段と、
後退操作された前記内針保持部材を所定の発射待機位置で係止する内針係止手段と、
後退操作された前記外針保持部材を所定の発射待機位置で係止する外針係止手段と、
前記内針係止手段及び前記外針係止手段を順次係止解除する係止解除操作手段と、
前記内針保持部材の後退操作に応じて蓄勢され、前記内針係止手段の係止解除操作に応じて前記内針を前進方向に発射させる内針発射バネと、
前記外針保持部材の後退操作に応じて蓄勢され、前記外針係止手段の係止解除操作に応じて前記外針を前進方向に発射させる外針発射バネと、を備え、
前記内針の発射後に前記凹部に入り込んだ生体組織を前記外針の発射により切断採取する生検針装置であって、
前記内針は、中空部を有する円筒針であり、
前記内針保持部材は、
前記内針の中空部を介して前記凹部と連通するシリンダと、
前記シリンダに進退自在に内装されるピストンと、
前記ピストンを前記シリンダに対して後退方向に付勢可能なピストン後退バネと、
前記ピストンを所定の後退待機位置で係止するピストン係止手段と、を備え、
前記筐体は、前記内針保持部材の後退操作時に前記ピストンの後退を制限し、該ピストンを前記シリンダに対して相対的に前進させつつ前記ピストン後退バネを蓄勢させるピストンストッパを備え、
前記係止解除操作手段は、
前記内針係止手段、前記ピストン係止手段及び前記外針係止手段を順次係止解除することが可能であり、
前記内針係止手段の係止解除操作に応じた前記内針の発射後、前記ピストン係止手段の係止解除操作に応じて前記ピストン後退バネが前記ピストンを後退させることにより、前記内針の凹部に負圧を発生させて該凹部内に生体組織を吸引し、その後、前記外針係止手段の係止解除操作に応じて前記外針を発射させて前記凹部に入り込んだ生体組織を切断採取することを特徴とする生検針装置。 An inner needle having a recess in the outer periphery near the tip;
A cylindrical outer needle that is externally fitted to the inner needle so as to be slidable in the longitudinal direction;
An inner needle holding member for holding a proximal end portion of the inner needle;
An outer needle holding member for holding a proximal end portion of the outer needle;
A housing for accommodating the inner needle holding member and the outer needle holding member so as to freely advance and retract;
Retreat operation means for retreating the inner needle holding member and the outer needle holding member;
Inner needle locking means for locking the inner needle holding member that has been operated backward at a predetermined firing standby position;
Outer needle locking means for locking the outer needle holding member that has been retracted at a predetermined firing standby position;
Unlocking operation means for sequentially unlocking the inner needle locking means and the outer needle locking means;
An inner needle firing spring that is stored in accordance with a backward operation of the inner needle holding member and fires the inner needle in a forward direction in accordance with an unlocking operation of the inner needle locking means;
An outer needle firing spring that is stored in accordance with a backward operation of the outer needle holding member and that fires the outer needle in a forward direction in accordance with an unlocking operation of the outer needle locking means;
A biopsy needle device that cuts and collects biological tissue that has entered the recess after firing the inner needle by firing the outer needle,
The inner needle is a cylindrical needle having a hollow part,
The inner needle holding member is
A cylinder communicating with the recess through the hollow portion of the inner needle;
A piston mounted in the cylinder so as to freely advance and retract;
A piston retraction spring capable of urging the piston in the retraction direction with respect to the cylinder;
Piston locking means for locking the piston at a predetermined backward standby position, and
The housing includes a piston stopper that restricts retraction of the piston during a retraction operation of the inner needle holding member, and accumulates the piston retraction spring while advancing the piston relative to the cylinder.
The unlocking operation means is
The inner needle locking means, the piston locking means and the outer needle locking means can be unlocked sequentially,
After the inner needle is fired according to the unlocking operation of the inner needle locking means, the piston retraction spring retracts the piston according to the unlocking operation of the piston locking means, so that the inner needle A negative pressure is generated in the concave portion of the body to suck the biological tissue into the concave portion, and then the outer needle is fired in response to the unlocking operation of the outer needle locking means to enter the biological tissue that has entered the concave portion. A biopsy needle device characterized by cutting and collecting. 前記筐体の外部から前記シリンダの内部を目視可能にする体液採取確認窓を備えることを特徴とする請求項１又は２に記載の生検針装置。   The biopsy needle device according to claim 1, further comprising a body fluid collection confirmation window that allows the inside of the cylinder to be visually observed from the outside of the housing.
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